The folks were about to lose it to a tax sale and so I bought it even though it was not in my geographical area.

As a result, I've been driving for dollars and mining the county auditor's website for properties with delinquent taxes.

In the US, there are a thousand companies that batch search various public records for a small fee, like the telephone book or voter records, to match names & addresses with phone numbers.

I am thankful and looking for feedback from our professional tax preparers. 

I would recommend following through with the early termination fee; which in itself is quite generous compared to other termination fees I've seen before.

And you forgot to count the tax savings as returns.

I have been trying to break into the residential space on my own by driving for dollars, knocking on doors, sending letters, and cold-calling lists of vacant, pre-foreclosure, and tax-delinquent properties.

couple of questions1. are the taxes correct, will they go up after purchase/reassessment?

They most likely have a "story" they told the owner and you being there again may jeopardize that story and therefore whatever their assignment fee is, or something along those lines.  

Enter recurring charges and automatic late fees.